Encontrados 12 documentos, a visualizar página 1 de 2
Apseudomorph tanaidaceans (Crustacea: Peracarida) from mud-volcanoes in the Gul...
Blazewicz-Paszkowycz, M; Bamber, RN; Cunha, MRFaunal collections from mud-volcano sites in the Gulf of Cadiz, at depths between 355 and 3061 m, have revealed a high diversity (and in some cases high density) of tanaidaceans. A previous paper has described some of the tanaidomorph species found. Records of apseudomorph species from deep-sea chemosynthetic habitats are almost non-existent. The present study reports on seven apseudomorph species from five dif...
A new 'saccamminid' genus (Rhizaria: Foraminifera), from 4400 m water depth in ...
Aranda da Silva, A; Gooday, AJ; Pearse, RB; Cunha, MRWe describe Bithekammina occulta, a new monothalamous agglutinated foraminiferan ('saccamminid') collected in multicore samples at 4400 m on the terrace of the lower Nazare Canyon on the Portuguese margin. The test is spherical to oval, up to similar to 400 mu m in length, with a simple circular aperture. The wall has a very smooth surface with a distinct sheen in reflected light. It is <10 mu m thick and compo...
Systematic and Evolutionary Insights Derived from mtDNA COI Barcode Diversity i...
Matzen da Silva, J; Creer, S; dos Santos, A; Costa, AC; Cunha, MR; Costa, FO; Carvalho, GRBackground: Decapods are the most recognizable of all crustaceans and comprise a dominant group of benthic invertebrates of the continental shelf and slope, including many species of economic importance. Of the 17635 morphologically described Decapoda species, only 5.4% are represented by COI barcode region sequences. It therefore remains a challenge to compile regional databases that identify and analyse the e...
Nephtyidae (Annelida, Polychaeta) from southern Europe
Ravara, A; Cunha, MR; Pleijel, FEighteen nephtyid species belonging to four different genera are known from southern Europe. In this study we revise the nephtyids from this area and provide descriptions of all the known species. Geographical and bathymetrical distributions are given, together with ecological notes. Inermonephtys foretmontardoi, new species, is described, Micronephthys maryae is newly synonymized with M. stammeri and Aglaopham...
Two new species of Dendrobrachia Brook, 1889 (Cnidaria: Octocorallia: Dendrobra...
Lopez-Gonzalez, PJ; Cunha, MRExamination of recent benthic material collected during several cruises in the Gulf of Cadiz (NE Atlantic) and the Strait of Sicily (Mediterranean) has allowed the taxonomic reassessment of some previously identified specimens belonging to the monogeneric gorgonian family Dendrobrachiidae Brook, 1889. Dendrobrachia fallax Brook, 1889 is the type species of the single genus in this family, and was originally des...
The trophic biology of the holothurian Molpadia musculus: implications for orga...
Amaro, T; Bianchelli, S; Billett, DSM; Cunha, MR; Pusceddu, A; Danovaro, RMegafaunal organisms play a key role in ecosystem functioning in the deep-sea through bioturbation, bioirrigation and organic matter cycling. At 3500 m water depth in the Nazar, Canyon, NE Atlantic, very high abundances of the infaunal holothurian Molpadia musculus were observed. To quantify the role of M. musculus in sediment cycling, sediment samples and holothurians were collected using an ROV and in situ ex...
Biodiversity of Cold Seep Ecosystems Along the European Margins
Vanreusel, A; Andersen, AC; Boetius, A; Connelly, D; Cunha, MR; Decker, C; Hilario, A; Kormas, KA; Maignien, L; Olu, K; Pachiadaki, M; Ritt, BDuring the European Commission's Framework Six Programme, HERMES, we investigated three main areas along the European margin, each characterized by the presence of seep-related structures exhibiting different intensity of activity and biological diversity. These areas are: (1) the Nordic margin with the Hakon Mosby mud volcano and many pockmarks, (2) the Gulf of Cadiz, and (3) the eastern Mediterranean with its...
Europe's Grand Canyon Nazaré Submarine Canyon
Tyler, P; Amaro, T; Arzola, R; Cunha, MR; de Stigter, H; Gooday, A; Huvenne, V; Ingels, J; Kiriakoulakis, K; Lastras, G; Masson, D; Oliveira, AThe Nazare submarine canyon extends similar to 210 km westward from the coast of Portugal, down to a water depth of > 4300 m. The considerable habitat heterogeneity found throughout the canyon is affected by strong currents and high turbidity, especially in the upper parts of the canyon. The canyon morphology comprises steep slopes, scarps, terraces, and overhangs, and a deeply incised thalweg is found in the l...
On some frenulate species (Annelida : Polychaeta : Siboglinidae) from mud volca...
Hilario, A; Cunha, MRCollections of Frenulata made by the RV Professor Logachev in the Gulf of Cadiz in 2006 contain two new species, one belonging to the genus Spirobrachia, and another that was assigned to a new genus. Spirobrachia tripeira n. sp. is the first record of the genus in the North Atlantic Ocean; it has a very stiff, straight, orange tube; its tentacles have pinnules and are arranged in a spiral crown without a lophop...
A new subfamily, Vulcanocalliacinae n.subfam., for Vulcanocalliax arutyunovi n....
Dworschak, PC; Cunha, MRA new ghost shrimp, Vulcanocalliax arutyunovi n.gen. n.sp., is described and accommodated in the new subfamily Vulcanocalliacinae. This subfamily shares with the Bathycalliacinae Sakai & Turkay, 1999 the presence of epipods on the third maxilliped and the first four pairs of pereopods, but differs by the absence of cardiac sulci and a dorsomedian carina. This is the second record of a thalassinidean crustacean ...
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